Implementasi Sensor Suhu LM35 Berbantuan Mikrokontroler Pada Perancangan Sistem Pengkondisian Suhu Ruangan

Abstract

Implementation of LM35 temperature sensor aided the microcontroller on design room temperature conditioning system has been done, through the steps of: (1) integration LM35 temperature sensor to the microcontroller system, (2) programming of the Arduino Uno R3 microcontroller, and (3) verification of the test program. Integration into the microcontroller system, such as the provision of four main ports of microcontroller was connected to: i) 5 volt dc power supply, ii) LM35, iii) electromechanical relays, and iv) 2x16 LCD. Based on the sensor connection to the Arduino Uno R3 obtained orders addressing "int tempPin= 0;" for sensor-1 serves to measure the temperature in the room and "int tempPin = 1;" for sensor-2 is used to measure the rate of cooling the thermoelectric cooling system. Verification test was conducted to determine the achievement of the target value. The target temperature of 25 °C for the detection performed by the sensor-1 and 10 °C for the detection performed by the sensor-2. These conditions are described in the description, namely (a) if the value of the detected temperature is upper than 25 0C, then the blower fan will operate ("on"), (b) if the value of the detected temperature is less than 25 0C, then the blower fan will stop operating ("off"), and (c) if the temperature that detected by sensor-1 more than the value of 25 0C and temperature that detected by sensor-2 in thermoelectric cooling system is below the value of 10 0C, then the blower fan and thermoelectric cooling system will operate ("on").